The Balega Blister Resist quarter crew running sock gets its blister resistant mojo from the unique combination of natural Mohair and Drynamix. Turns out, mohair is really soft and really strong. And when it's woven with Drynamix in the 8165 sock, it creates a fiber that significantly reduces sheer friction, protecting your feet from blisters for the long run. Or short run. Your call. Balega socks are engineered with the company's proprietary Drynamix moisture management technology that keeps feet cool and dry while allowing free airflow for maximum comfort, performance and durability. All of Balega's running socks have been race tested and incorporate a hand linked seamless toe, eliminating abrasion across the top of the foot. The company also knits an extra deep heel pocket or "Fit Well," ensuring that each sock fits the foot perfectly and does not slide down during a run. Balega: developed by athletes for those who love to run.